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Understanding Torque Operation

Understanding Torque Operation . Introduction to Torque Convertor Diagnosis. Outline. Introduction to torque convertors Components of a torque convertor Functions of each component Types of oil flow Four stages of operation Diagnosing lock up torque convertors

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Understanding Torque Operation

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  1. Understanding Torque Operation Introduction to Torque Convertor Diagnosis

  2. Outline Introduction to torque convertors Components of a torque convertor Functions of each component Types of oil flow Four stages of operation Diagnosing lock up torque convertors Diagnosing noisy torque convertors

  3. Today you sat at a light with your foot on the brake, and the car in gear and when the light turned green you acceleratecd and drove away. And now for the rest of the story

  4. Job description • Allows the car to idle at a stop sign • Slips during initial acceleration • Locks up on the highway

  5. The Torque convertor is the link between the engine and the transmission

  6. Consider the operation of two fans placed close together

  7. Here are the basic components of a torque convertor

  8. The function of the components

  9. A stator makes the convertor more efficient

  10. There are two types of oil flow happening inside a convertor

  11. Stages of operationStall stage Engine Speed • Impeller_______________ • Stator__________________ • Turbine________________ Holding Stationary

  12. Torque multiplication • Impeller_________________ • Stator___________________ • Turbine__________________ Engine Speed Holding Turning

  13. Coupling Stage Engine Speed • Impeller_________________ • Stator ____________________ • Turbine___________________ Free wheeling Up to 9/10 Engine Speed

  14. Lock up stage What is the maximum efficiency of this convertor? Could we make it more efficient? What if we locked the turbine to the convertor housing?

  15. Lock up convertor diagnosis • typically only lock up in higher ratios • Usually the engine must be warm • Typically unlock when brake applied

  16. Convertor noise • Occasionally you will encounter a noisy convertor

  17. Convertor stall test • Demo in shop

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